Neon tetras??

How can I take well care of neon tetras?
i have a 20 gallon tank so how many neons can I put in it?
do I need a heater for them. If yes any guess how much it might cost?
any info on neons will be helpful

Neon tetras are a bit delicate, I believe this is due to the high demand and excessive breeding though. You'll have to keep a very close eye on water parameters with these fish. They do need to be in schools of six or more, and how many you can have really depends on what other fish you want in the tank with them.

As for a heater, yes, they need one. So far, the Aqueon Pro Adjustable Heater hasn't failed my 20g.

Around $25 for the kit. You can also order off Amazon: http://www.amazon.com/API-Freshwater-Master-Test-Kit/dp/B000255NCI/ref=sr_1_1?s=pet-supplies&ie=UTF8&qid=1435927256&sr=1-1&keywords=api+freshwater+master+test+kit

This may seem like a lot, but ultimately it'll save you tons more than the inaccurate test strips!

If you just did neons you could have 20 in there but you need the water temp in the upper 70s and good filtration. Other than betta, neons were my first fish and unknowingly I cycled my first tank with 5 of them and a betta. I've only lost one and the betta got it. But you need a minimum of 6

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